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Re: RDF 1.1 IRIs and %-escaping

From: Steve Harris <steve.harris@garlik.com>
Date: Wed, 8 Aug 2012 12:05:55 +0100
Cc: Dan Brickley <danbri@danbri.org>, Andy Seaborne <andy.seaborne@epimorphics.com>, public-rdf-comments Comments <public-rdf-comments@w3.org>, Giovanni Tummarello <giovanni.tummarello@deri.org>, Graham Klyne <gk@ninebynine.org>
Message-Id: <84F3CB60-A2E6-423C-80F9-1BDB188C8083@garlik.com>
To: Richard Cyganiak <richard@cyganiak.de>

This is one of the few annoyances in RDF that we can fix with little pain.

- Steve

On 2012-08-08, at 12:01, Richard Cyganiak wrote:

> Dan,
> On 8 Aug 2012, at 00:14, Dan Brickley wrote:
>> Does Sindice keep a cache of raw crawled RDF somewhere?
> My understanding is that there are caches of raw bytes.
>> I know this would be extra work for someone though :(
> I can't speak for Giovanni, but I think this might be a slight understatement given that the standard Sindice infrastructure cannot be used, and given that the behaviour of normal off-the-shelf components and of the whole SPARQL stack with regard to spaces in URIs would need to be carefully looked into to analyze this (in other words, this isn't a job for an intern). It may not be worth it.
> Some points:
> 1. RDF 2004 is the only standard on the planet that allows spaces in URIs/IRIs
> 2. This is the result of historical accident and WG timing (the IRI spec was still in draft status, and the 2004 RDF-WG thought it important to remain compatible with early IRI drafts)
> 3. Spaces in URIrefs don't actually work interoperably in implementations of RDF 2004
> 4. Spaces in URIrefs don't work within the broader RDF stack (SPARQL doesn't support them)
> 5. Not a single instance where spaces in URIrefs are used intentionally has been shown
> 6. Not a single instance where SPARQL's non-support for spaces in IRIs has led to user complaints has been shown
> 7. The RDF-WG charter asks the WG to update RDF to follow SPARQL with regard to IRIs
> To me, this is sufficient evidence that the change we made for RDF 1.1 is the right thing to do.
> Best,
> Richard

Steve Harris, CTO
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Received on Wednesday, 8 August 2012 11:13:14 UTC

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